cc/base/switches.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/base/switches.h"
   6
   7 #include "base/command_line.h"
   8
   9 namespace cc {
  10 namespace switches {
  11
  12 // On platforms where checkerboards are used, prefer background colors instead
  13 // of checkerboards.
  14 const char kBackgroundColorInsteadOfCheckerboard[] =
  15     "background-color-instead-of-checkerboard";
  16
  17 const char kDisableThreadedAnimation[] = "disable-threaded-animation";
  18
  19 // Disables layer-edge anti-aliasing in the compositor.
  20 const char kDisableCompositedAntialiasing[] =
  21     "disable-composited-antialiasing";
  22
  23 // Paint content on the main thread instead of the compositor thread.
  24 // Overrides the kEnableImplSidePainting flag.
  25 const char kDisableImplSidePainting[] = "disable-impl-side-painting";
  26
  27 // Paint content on the compositor thread instead of the main thread.
  28 const char kEnableImplSidePainting[] = "enable-impl-side-painting";
  29
  30 const char kEnableTopControlsPositionCalculation[] =
  31     "enable-top-controls-position-calculation";
  32
  33 // For any layers that can get drawn directly to screen, draw them with the Skia
  34 // GPU backend.  Only valid with gl rendering + threaded compositing + impl-side
  35 // painting.
  36 const char kForceDirectLayerDrawing[] = "force-direct-layer-drawing";
  37
  38 // The height of the movable top controls.
  39 const char kTopControlsHeight[] = "top-controls-height";
  40
  41 // Percentage of the top controls need to be hidden before they will auto hide.
  42 const char kTopControlsHideThreshold[] = "top-controls-hide-threshold";
  43
  44 // Percentage of the top controls need to be shown before they will auto show.
  45 const char kTopControlsShowThreshold[] = "top-controls-show-threshold";
  46
  47 // Number of worker threads used to rasterize content.
  48 const char kNumRasterThreads[] = "num-raster-threads";
  49
  50 // Show metrics about overdraw in about:tracing recordings, such as the number
  51 // of pixels culled, and the number of pixels drawn, for each frame.
  52 const char kTraceOverdraw[] = "trace-overdraw";
  53
  54 // Re-rasters everything multiple times to simulate a much slower machine.
  55 // Give a scale factor to cause raster to take that many times longer to
  56 // complete, such as --slow-down-raster-scale-factor=25.
  57 const char kSlowDownRasterScaleFactor[] = "slow-down-raster-scale-factor";
  58
  59 // The scale factor for low resolution tile contents.
  60 const char kLowResolutionContentsScaleFactor[] =
  61     "low-resolution-contents-scale-factor";
  62
  63 // Max tiles allowed for each tilings interest area.
  64 const char kMaxTilesForInterestArea[] = "max-tiles-for-interest-area";
  65
  66 // The amount of unused resource memory compositor is allowed to keep around.
  67 const char kMaxUnusedResourceMemoryUsagePercentage[] =
  68     "max-unused-resource-memory-usage-percentage";
  69
  70 // Causes the compositor to render to textures which are then sent to the parent
  71 // through the texture mailbox mechanism.
  72 // Requires --enable-compositor-frame-message.
  73 const char kCompositeToMailbox[] = "composite-to-mailbox";
  74
  75 // Check that property changes during paint do not occur.
  76 const char kStrictLayerPropertyChangeChecking[] =
  77     "strict-layer-property-change-checking";
  78
  79 // Virtual viewport for fixed-position elements, scrollbars during pinch.
  80 const char kEnablePinchVirtualViewport[] = "enable-pinch-virtual-viewport";
  81
  82 const char kEnablePartialSwap[] = "enable-partial-swap";
  83 // Disable partial swap which is needed for some OpenGL drivers / emulators.
  84 const char kUIDisablePartialSwap[] = "ui-disable-partial-swap";
  85
  86 const char kEnablePerTilePainting[] = "enable-per-tile-painting";
  87 const char kUIEnablePerTilePainting[] = "ui-enable-per-tile-painting";
  88
  89 // Renders a border around compositor layers to help debug and study
  90 // layer compositing.
  91 const char kShowCompositedLayerBorders[] = "show-composited-layer-borders";
  92 const char kUIShowCompositedLayerBorders[] = "ui-show-layer-borders";
  93
  94 // Draws a FPS indicator
  95 const char kShowFPSCounter[] = "show-fps-counter";
  96 const char kUIShowFPSCounter[] = "ui-show-fps-counter";
  97
  98 // Show rects in the HUD around layers whose properties have changed.
  99 const char kShowPropertyChangedRects[] = "show-property-changed-rects";
 100 const char kUIShowPropertyChangedRects[] = "ui-show-property-changed-rects";
 101
 102 // Show rects in the HUD around damage as it is recorded into each render
 103 // surface.
 104 const char kShowSurfaceDamageRects[] = "show-surface-damage-rects";
 105 const char kUIShowSurfaceDamageRects[] = "ui-show-surface-damage-rects";
 106
 107 // Show rects in the HUD around the screen-space transformed bounds of every
 108 // layer.
 109 const char kShowScreenSpaceRects[] = "show-screenspace-rects";
 110 const char kUIShowScreenSpaceRects[] = "ui-show-screenspace-rects";
 111
 112 // Show rects in the HUD around the screen-space transformed bounds of every
 113 // layer's replica, when they have one.
 114 const char kShowReplicaScreenSpaceRects[] = "show-replica-screenspace-rects";
 115 const char kUIShowReplicaScreenSpaceRects[] =
 116     "ui-show-replica-screenspace-rects";
 117
 118 // Show rects in the HUD wherever something is known to be drawn opaque and is
 119 // considered occluding the pixels behind it.
 120 const char kShowOccludingRects[] = "show-occluding-rects";
 121 const char kUIShowOccludingRects[] = "ui-show-occluding-rects";
 122
 123 // Show rects in the HUD wherever something is not known to be drawn opaque and
 124 // is not considered to be occluding the pixels behind it.
 125 const char kShowNonOccludingRects[] = "show-nonoccluding-rects";
 126 const char kUIShowNonOccludingRects[] = "ui-show-nonoccluding-rects";
 127
 128 // Enable rasterizer that writes directly to GPU memory.
 129 const char kEnableMapImage[] = "enable-map-image";
 130
 131 // Disable rasterizer that writes directly to GPU memory.
 132 // Overrides the kEnableMapImage flag.
 133 const char kDisableMapImage[] = "disable-map-image";
 134
 135 // Prevents the layer tree unit tests from timing out.
 136 const char kCCLayerTreeTestNoTimeout[] = "cc-layer-tree-test-no-timeout";
 137
 138 bool IsImplSidePaintingEnabled() {
 139   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 140
 141   if (command_line.HasSwitch(cc::switches::kDisableImplSidePainting))
 142     return false;
 143   else if (command_line.HasSwitch(cc::switches::kEnableImplSidePainting))
 144     return true;
 145
 146 #if defined(OS_ANDROID)
 147   return true;
 148 #else
 149   return false;
 150 #endif
 151 }
 152
 153 bool IsMapImageEnabled() {
 154   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 155
 156   if (command_line.HasSwitch(cc::switches::kDisableMapImage))
 157     return false;
 158   else if (command_line.HasSwitch(cc::switches::kEnableMapImage))
 159     return true;
 160
 161   return false;
 162 }
 163
 164 }  // namespace switches
 165 }  // namespace cc